Hoisting-gear



(No Model.)

D. L. BROWN.

HOISTING GEAR.

No. 389,052. Patented Sept. 4, 1888.

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UNITED STATES PATENT @rrica,

DEXVALDEN L. BROWN, OF FRANKLIN, MASSACHUSETTS.

HOlSTlNG-GEAR.

SPECIFICATION forming part of Letters Patent No. 389,052, datedSeptember t, 1888.

Application filed June 16, 1888.

To aZZ whom it may concern.-

Be it known that I, DEWALDEN L. BROWN, of Franklin, in the county ofNorfolk, State of Massachusetts, have invented a certain new and usefulImprovement in Hoisting Gears, of which the following is a descriptionsufficiently full, clear, and exact to enable any person skilled in theart or science to which said invention appertains to make and use thesame, reference being had to the accompanying drawings, forming part ofthis specification, in which- Figure 1 is a top plan View of my improvedhoisting-gear, the rope being represented as taut; and Fig. 2, avertical section taken on line a: 00 in Fig. 1, certain of the partsbeing shown in side elevation and the rope being represented as slack.

Like letters and figures of reference indicate corresponding parts inthe different figures of the drawings.

My invention relates to that class of hoistinggcar which is employed inderricks, on shipboard, in warehouses, &c., for raising blocks of stone,anchors, bales of goods, and other heavy bodies; and it consists incertain novel features, as hereinafter fully set forth and claimed, theobject being to produce a simpler, cheaper, and more effective device ofthis character than is now in ordinary use.

The nature and operation of the improvement will be readily understoodby all conversaut with such matters from the following explanation:

In the drawings,A represents the Windlass; B B, the standards orsupports in which the Windlass is journaled, and O a rope or cable.

The standards may be arranged vertically, horizontally, or in any othersuitable position, it being understood that they are to be firmlysecured to proper supports.

Two ratchet-wheels, 15, are attached to the Windlass, one adjacent toeach of the standards B, the teeth of said wheels inclining in the samedirection. A triangular plate, D, is connected with the inner face ofeach of the standards B by a screw-bolt, 25, which passes through anelongated outwardly-curved slot, 35, in said plate, said slotconstituting the arc of a circle of which the Windlass Ais the cen ter.The lower edge of the plate D is cut out or curved, as shown at 45, thecurves of the slot 35 and said edge being in parallelism with eachother. Attached to the forward lower corner of each of the plates 1), asviewed from the right in Figs. 1 and 2, there is an actuating-pawl, 55,adapted to engage the teeth of the ratchetwheel 15, and pivoted to theopposite corner of each of said plates there is a brake-shoe, 65. Ascrew-bolt, 75, is inserted in each of the standards 13 beneath thecurved edge 45 of the plate D, said bolts acting as fulcrums for theplates when oscillated to rotate the Windlass, the bolts 25 and 75 beingso arranged with respect to each other that a vertical line drawnthrough the bolt 75 will be slightly nearer the Windlass than a verticalline drawn through the bolt 25 when the windlass is arranged as shown inthe drawings. A detachable lever, E, is inserted in a socket in theouter end of each of the plates D for rocking or oscillating saidplates. A recess,85, is formed in the plate 1) at the forward end andlower side of the slot 35 for receiving the bolt 25, as hereinafterdescribed.

' Secured to the Windlass A, at either side of each of the ratchetwheels 15, there is a disk, 95. These disks are slightly greater indiameter than the ratchetwheels, their peripheries projecting beyond theteeth of said wheels and serving as frictiou-drunus on which thebrake-shoes act, each of said shoes being wide enough to span two of thedisks and one of said ratchet-wheels and kept out of con tact with thewheels by the drums.

In the use of my improved gear the plates D are alternately moved backand forth on their supports by the levers E, their pawls alternatelyengaging and Zreleasing the teeth of the ratchet-wheelsl5,and rotatingthe windlass in a manner that will be readily under stood by allconversant with such matters without a more explicit description.

In drawing the plates forward, when it is desired to merely wind up thecable or rope on the Windlass, the plates are not advanced sufficientlyto permit the bolt 25 to drop into the recess 85; but by drawing eitherof the plates forward sufficiently to permit the bolt 25 to drop intothe recess 85 the pawl 55 will be detached from the teeth of theratchet-wheel 15 and the brake-shoe brought into contact with theperipheries of the disks 95 at either side of said'w'heel, therebyenabling the drum A to be controlled and the rope to be slacked and thearticle being raised to be lowered at any speed desired.

Drums H are mounted on the outer ends of the Windlass on which ropes orcables may be wound.

One plate, D, may be omitted, if desired, and a retainingpawl used tohold the windlass while moving the actuating-pawl forward to take a newhold.

A pin, 14, is employed to hold the plate D and enable the lever E to bereleased without without permitting the Windlass to be turned back.

Having thus explained my invention, what I claim is 1. In a device ofthe character described, a windlassjournaled in standards or supports, aratchet-wheel and a friction-disk secured on said Windlass, a platehaving its inner edge curved and provided with a curved slot in its bodyin parallelism therewith and having a lateral recess at one end of saidslot for receiving thesupporting-pin, an actuating-pawl on said plate, abrake-shoe pivoted to said plate, a lever for oscillating said plate,and two bolts, one of which passes through said slot into a support forthe plate and the other into said support adjacent to the curved edge ofthe plate, said plate being so arranged that its actuating-pawl willengage the ratchetwheel on the Windlass and its brake-shoe thefriction-disk on the Windlass, substantially as set forth.

2. In a device of the character described, the Windlass A, provided withthe ratchetwheels and disks 95, the standards B, in which said Windlassis journaled, the plates D, provided, respectively. with the curvededges 45, curved slots 35. recesses 85, and pawls 55, the brake-shoes65. pivoted to said plates, the bolt 25, inserted in said slots andsecured to the standards D, the bolts 75, se cured to the standards D,and so disposed as to respectively engage the curved edges 45 of theplate D, and the levers E for said plates, all being combined andarranged to operate substantially as specified.

3. In a device of the character described, the Windlass A, provided withthe ratchetwheels 15 and disks 95, the standards B, in which saidWindlass is journaled, the plates D, provided, respectively, with thecurved edges 45, curved slots 35. recesses 85, and pawls 55, thebrake-shoes 65, pivoted to said plates, the bolt 25, inserted in saidslots and secured to the standards D, the bolts 75, secured to thestandards D, and so disposed as to respectively engage the curved edges45 of the plate D, the levers E for said plates, and the pin 14, allbeing combined and arranged to operate substantially as set forth.

DEWALDEN L. BROWN.

W'itnesses:

CLARENCE E. GRIFFIN, HENRY-R. JENKS.

